Mechanical characteristics of human body surface and its measurement method

Abstract

We made the test pieces out of visco-elastic polymer, similar to mechanical characteristics of human body surface. We picked up polyester resin, hardness of which was changed at will, and we got desirable test pieces. Two measuring instruments were made. One of them measures spring constant and damping constant of human body surface, another does mechanical impedance.
Concerning the former method, bellows controlled by air pressure push the point of human body and it records reactiue forces and displacement of the test pieces. Spring constant and damping constant are calculated from these recorded values. Concerning the latter, vibrometer are made putting speaker to good use, and mechanical impedance are measured from moving impedance of vibrometer.
However both methods are not satisfactory to measure the mechanical charactetistics of human body surface, therefore measuring method are discussed and the important problem are picked up for coming study.